Can chili rasboras live with cardinal tetras?

Verdict
Yes

Yes, chili rasboras and cardinal tetras can live together. Both are fine at 76–82°F. Plan on at least 20 gal.

Chili rasboraChili rasbora75–82°F · pH 4–7 Cardinal tetraCardinal tetra76–84°F · pH 4.6–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–82°Chili rasbora 75–82°Cardinal tetra 76–84°
The green band is the temperature range both can live in.
456789Both: 4.6–7Chili rasbora 4–7Cardinal tetra 4.6–7
The green band is the pH both tolerate.

Size to scale

Chili rasbora · 0.8 inCardinal tetra · 2 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

Chili rasboraCardinal tetra
Temperature75–82 °F76–84 °F
pH4–74.6–7
Adult size0.8 in2.0 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 8+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for chili rasboras

All chili rasbora tank mates

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Questions

Can chili rasboras live with cardinal tetras?

Yes, chili rasboras and cardinal tetras can live together. Both are fine at 76–82°F. Plan on at least 20 gal.

What temperature suits both chili rasboras and cardinal tetras?

76–82 °F. Chili rasboras need 75–82 °F, cardinal tetras need 76–84 °F.

What size tank do chili rasboras and cardinal tetras need together?

At least 20 gal, set by the cardinal tetra. Add space for each extra fish.